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Sun, 8 Mar 2020 03:56:13 +0000 Received: from BYAPR18MB2535.namprd18.prod.outlook.com ([fe80::8cd1:1741:8d2d:1c23]) by BYAPR18MB2535.namprd18.prod.outlook.com ([fe80::8cd1:1741:8d2d:1c23%7]) with mapi id 15.20.2793.013; Sun, 8 Mar 2020 03:56:13 +0000 From: Alex Belits To: "frederic@kernel.org" , "rostedt@goodmis.org" CC: "mingo@kernel.org" , "peterz@infradead.org" , "linux-kernel@vger.kernel.org" , Prasun Kapoor , "tglx@linutronix.de" , "linux-api@vger.kernel.org" , "catalin.marinas@arm.com" , "linux-arm-kernel@lists.infradead.org" , "netdev@vger.kernel.org" , "davem@davemloft.net" , "linux-arch@vger.kernel.org" , "will@kernel.org" Subject: [PATCH v2 11/12] task_isolation: kick_all_cpus_sync: don't kick isolated cpus Thread-Topic: [PATCH v2 11/12] task_isolation: kick_all_cpus_sync: don't kick isolated cpus Thread-Index: AQHV9P2C8Ps2pU+gnk+87Km1UNmHNA== Date: Sun, 8 Mar 2020 03:56:13 +0000 Message-ID: References: <4473787e1b6bc3cc226067e8d122092a678b63de.camel@marvell.com> In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [199.233.58.128] x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: e28157aa-2ca2-4fb6-7ad0-08d7c314a567 x-ms-traffictypediagnostic: BYAPR18MB2661: x-ms-exchange-transport-forked: True x-microsoft-antispam-prvs: x-ms-oob-tlc-oobclassifiers: OLM:873; x-forefront-prvs: 03361FCC43 x-forefront-antispam-report: SFV:NSPM; SFS:(10009020)(4636009)(396003)(366004)(136003)(39850400004)(346002)(376002)(189003)(199004)(36756003)(4744005)(71200400001)(4326008)(86362001)(2906002)(54906003)(110136005)(316002)(2616005)(8936002)(81156014)(8676002)(81166006)(26005)(186003)(66446008)(66476007)(64756008)(66556008)(66946007)(5660300002)(76116006)(478600001)(7416002)(91956017)(6486002)(6512007)(6506007); DIR:OUT; SFP:1101; SCL:1; SRVR:BYAPR18MB2661; H:BYAPR18MB2535.namprd18.prod.outlook.com; FPR:; SPF:None; LANG:en; PTR:InfoNoRecords; MX:1; A:1; received-spf: None (protection.outlook.com: marvell.com does not designate permitted sender hosts) x-ms-exchange-senderadcheck: 1 x-microsoft-antispam: BCL:0; x-microsoft-antispam-message-info: BOWGO4LhwRBTMLm5/CQrGqZJPeajT1OFva3gjwLbus+yIY7/6Uo0jBdstk0NOSdUxVZLvfGcZTEQyQEyZ9IV7FlRr9gazC3JxVZzGKiwmv5LgOflqy7eZPc/i5ecqpqvlbEC5eqFP4FfTehtDHaOqpDt4KouKq8csYldMD9oHpVGKu6MG2LzTsugsF9pvwTF/vxl1NeaM2R6igPJKLixSmpm3LBE4OPiuuYwag59YCyKkuZjsAfilEpQxDfcw1SZm6wDhCsmyXQ4vgIU0lpaq9SgcHIKngqUjchxaqLzuuriyNMZmjs/4HtSmY92WJnkMFuBde/QVXSdcO01CikxYAcQtuC+FK28TCmIoUB34HTF3IQewZBdwpdpZ7EPUneiGufMdaMqUlmUwAQwDlE35kaA/mxMzM3FGJ+uU8/Oti+tqg2K3aQMGlPmd534nD4Z x-ms-exchange-antispam-messagedata: ANR7TG8upBWlsjUwlwjj5USQwR0UNR4FGVu+5hrvI4z/CboyKMRlQuLwMRaHKbdC7ii/28Hv02CHJMevElORSo2fnnJtIp69fkDnC+cRj+AUWD9/AKFKS310XCJMEfWHSiY9KFoo54LLU/bPwPXCrw== Content-ID: <0CF0F9A752365D499FA079925E0AB4FC@namprd18.prod.outlook.com> MIME-Version: 1.0 X-MS-Exchange-CrossTenant-Network-Message-Id: e28157aa-2ca2-4fb6-7ad0-08d7c314a567 X-MS-Exchange-CrossTenant-originalarrivaltime: 08 Mar 2020 03:56:13.6429 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 70e1fb47-1155-421d-87fc-2e58f638b6e0 X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: IB/79jGHa0db6moNctxQP7N15aQ1TpSxdMtMT2QoLICroCaO8nusVbywKuGgsf3+Ffbby1eX2XhklmNF0dYGPw== X-MS-Exchange-Transport-CrossTenantHeadersStamped: BYAPR18MB2661 X-OriginatorOrg: marvell.com X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.138, 18.0.572 definitions=2020-03-07_09:2020-03-06,2020-03-07 signatures=0 Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org From: Yuri Norov Make sure that kick_all_cpus_sync() does not call CPUs that are running isolated tasks. Signed-off-by: Yuri Norov [abelits@marvell.com: use safe task_isolation_cpumask() implementation] Signed-off-by: Alex Belits --- kernel/smp.c | 14 +++++++++++++- 1 file changed, 13 insertions(+), 1 deletion(-) diff --git a/kernel/smp.c b/kernel/smp.c index 3a8bcbdd4ce6..d9b4b2fedfed 100644 --- a/kernel/smp.c +++ b/kernel/smp.c @@ -731,9 +731,21 @@ static void do_nothing(void *unused) */ void kick_all_cpus_sync(void) { + struct cpumask mask; + /* Make sure the change is visible before we kick the cpus */ smp_mb(); - smp_call_function(do_nothing, NULL, 1); + + preempt_disable(); +#ifdef CONFIG_TASK_ISOLATION + cpumask_clear(&mask); + task_isolation_cpumask(&mask); + cpumask_complement(&mask, &mask); +#else + cpumask_setall(&mask); +#endif + smp_call_function_many(&mask, do_nothing, NULL, 1); + preempt_enable(); } EXPORT_SYMBOL_GPL(kick_all_cpus_sync);